KR20220012187A - Heat exchange module for an energy storage module, and a production method for such a heat exchange module - Google Patents

Abstract

The present invention relates to a heat exchange module (1) for an energy storage module (2), which includes at least the following components: a module housing (3) for heat transfer contact with the energy storage module (2); at least one working medium channel (4) for working fluid for heat transport; and at least one fluid connection (5) for at least one external line (6) for the working fluid of the working medium channel (4). The heat exchange module (1) is formed, in particular, by the at least one working medium channel (4), in the channelwise extension of the working medium channel (4), at least one receiving opening (7) having a predetermined section; and a plug (8) having a shape filling a predetermined section of the receiving opening (7) is received within the receiving opening so as to be connected in a fluid-tight manner to the receiving opening (7). According to the heat exchange module proposed herein, a mounting space is used efficiently, an at the same time, the heat exchange module is manufactured at low cost.

Description

Heat exchange module for energy storage module and manufacturing method of the heat exchange module

The present invention relates to a heat exchange module for an energy storage module and a method for manufacturing the heat exchange module.

Energy storage modules of motor vehicles that are fully or partially electrically operated are cooled by liquid cooling according to the prior art. The idea for the realization of low cost is to manufacture the corresponding battery module housing by extrusion molding. In this case, cooling channels for liquid cooling can be integrated into the extrusion profile of the battery module housing in the form of a chamber. For good packing density (high space utilization efficiency), cooling channels with a non-round cross-section are advantageous.

According to the prior art, an axially compressed molded seal is used to seal such non-round cross-sections. This increases the required mounting space in the extrusion direction, in the case of an extrusion-molded integrated cooling channel, since such (wedge-shaped) molded seals protrude outward in the extension of the channel in order to achieve a reliable seal. because it should be The challenge of efficiently utilizing mounting space remains significant, and even a few millimeters can mean a significant competitive advantage.

Based on this, the object of the present invention is to at least partially overcome the disadvantages known from the prior art. The features according to the invention are derived from the independent claims, and advantageous constructions related thereto are described in the dependent claims. The features of the claims can be combined in any technically meaningful way, for which the features specified in the following description and drawings, including additional configurations of the invention, can also be used.

The present invention relates to a heat exchange module for an energy storage module comprising at least the following components:

- a module housing for heat transfer contact with the energy storage module;

- at least one working medium channel for a working fluid for heat transport; and

- at least one fluid connection for at least one external line for the working fluid of the working medium channel.

The heat exchange module in particular defines at least one receiving opening having a predetermined cross-section in the channel direction extension of the working medium channel by the at least one working medium channel, the receiving opening having a predetermined cross-section of the receiving opening in the receiving opening It is characterized in that a plug having a filling shape is received to engage in a fluid-tight manner in the receiving opening.

In the following, where axial, radial, or circumferential and corresponding expressions are used, unless otherwise specified, reference is made to the referenced axis of rotation. Ordinal numbers used in the preceding and following descriptions are used only for clear distinction, unless clearly indicated to the contrary, and do not reflect any order or predominance of the referred to elements. An ordinal number greater than 1 does not necessarily mean that there must be additional such components.

The heat exchange module presented herein can be used to enable the energy storage module to operate in an optimal temperature range and/or to prevent or delay dendrite formation known in lithium-based electric accumulators, for example in vehicle batteries. It is configured to cool (or optionally heat) an energy storage module of (eg, a so-called traction battery of an electrified drive train of a motor vehicle). The module housing for this purpose comprises a material which is in close contact with the energy storage module as much as possible and has as good a thermal conductivity as possible. Also provided are self-supporting structures and/or devices for crash safety, depending on the circumstances.

Through the at least one working medium channel a working fluid, preferably a liquid or alternatively a refrigerant or a gas, can flow and convey, whereby good heat transport between the working fluid and the module housing is sought. When a fluid-tight bond is referred to herein, it relates to the working fluid used. For working fluids that are (continuously) liquid, for example, where the gas fraction is negligible, a liquid-tight bond is sufficient in some circumstances. In one embodiment, a tortuous channel path is formed, wherein the channel sections are arranged parallel to each other in the direction of extrusion, for example in the case of an extruded heat exchange module, each forming a channel bend at the end face do. The channel sections need not be fluid-tight with respect to each other. Rather, leakage between individual channel sections is allowed.

At least one fluid connection is configured for the inlet and/or discharge of the working fluid, to which an external line, for example a component of a cooling circuit in the motor vehicle, can be connected and connected to the motor vehicle in an assembled state. In one embodiment, the external line may be press fit into the fluid connection. In one embodiment, the external line is connected to the fluid connection in advance prior to assembly, for example formed integrally with the fluid connection. In one embodiment, the heat exchange module comprises two fluid connections, namely an inlet and an outlet, between which the entire working medium channel extends as a functional group. In another embodiment, a plurality of such functional groups are provided within the heat exchange module.

Here, a configuration is now proposed in which a receiving opening for the plug is formed in the channel direction extension of the working medium channel (or of the channel section). The plug is formed into a corresponding shape such that it completely fills the predetermined cross-section of the receiving opening. In this case, it should be noted that in one preferred embodiment the plug is received with play in the receiving opening. In one embodiment, the play is removed after assembly in a subsequent step, so that the engagement between the plug and the receiving opening is fluid-tight. In one embodiment, the plug is wedge-shaped at least on the inlet side in the channel direction (ie towards the working medium channel) and the plug is received in the receiving opening over its entire length. For example, if the plug borders on its entire face, borders on its perimeter, or is received without play or with a relative oversize, then the plug is received in the receiving opening in a fluid-tight manner, with each contact face sealingly formed. do.

In one preferred embodiment, the (predetermined) cross-section of the receiving opening is equal to the cross-section of the working medium channel or the associated channel section. That is, there are no narrowing or widening portions, or localized projections or depressions. For example, the receiving opening is created during extrusion or extrusion molding of a heat exchange module, wherein each heat exchange module is a cut-off portion of a strand produced during extrusion. The at least one working medium channel and the receiving opening are not different from each other, except that the receiving opening is disposed on the end face after the associated heat exchange module is cut. In this embodiment, the arrangement in the channel direction extension is in the direction along the manufacturing axis (specific to extrusion).

More generally, the channel direction extension defines an axis defined by the path of the flowable portion of the working medium channel. For example, the channel direction extension is the path of the working medium channel extrapolated into the receiving opening. For example, the channel direction extension is normal to a predetermined cross-section of the working medium channel at the transition to the receiving opening. The receiving opening, in relation to its length range, is determined by the length of the plug or the mounting length (depending on the assembly principle and/or the sealing principle) of the plug. The receiving opening and the flowable working medium channel are preferably directly merged with one another without further intermediate elements and/or without changing the cross-section.

In one preferred embodiment, at least one plug is provided on each channel-wise end face of the heat exchange module. This is particularly advantageous for the production of heat exchange modules by extrusion.

That is, a cooling connection interface for an energy storage module, for example a cooling system of a vehicle battery, is formed. It is proposed, for example, in an extruded module housing, in which at least one working medium channel with a non-round cross-section is integrated into the hollow chamber and a cooling circuit is arranged outside the energy storage module. The extruded module housing is machined in such a way that the working medium channel has a receiving opening in its (channel direction) end region, in which the plug is arranged. The plug is watertightly coupled to the module housing by at least one bonding method and preferably has a round hole forming a fluid connection. Via said fluid connection, the medium guiding coolant connection of the external line can be connected in a watertight manner and is connected during operation.

In one preferred configuration, the receiving opening is arranged in the module housing in such a way that it does not project beyond the remaining extension of the module housing. That is, the extension of the receiving opening is arranged in the channel direction extension of the working medium channel inside the module housing. The receiving opening creates a uniform, preferably flat end face of the module housing. Thus, in this preferred embodiment the receiving opening is not a component extending the extension of the module housing in the channel direction, for example in the direction of the extrusion axis. A module housing produced, for example, by extrusion, is preferably separated flat with a cutting surface with an extrusion axis aligned perpendicular thereto. In this case, the cut surface becomes the end surface. An extension of the receiving opening in the channel direction extension of the working medium channel extends inwardly into the channel with respect to the direction of the extrusion axis.

In one embodiment, the module housing is machined by milling.

Furthermore, in one advantageous embodiment of the heat exchange module it is proposed that the plug comprises a fluid connection.

In this particularly advantageous embodiment, as the fluid connection is formed by the plug or directly in the plug, it is not necessary to form in the heat exchange module additional openings to be sealed for the fluid connection. In one embodiment, the line-side connection piece and the fluid connection region, preferably the entire plug, are formed from a material pairing, which can be implemented to be sealed in a form-fitting manner. Thus, an additional step for sealing is unnecessary. In one embodiment, the fluid connection is preformed prior to inserting the plug into the receiving opening of the heat exchange module, and in another embodiment only after inserting the plug. Preferably, the fluid connection has a (narrowest) flow cross-section that is significantly smaller than the (narrowest) flow cross-section of the working medium channel (regardless of the insertion position in the heat exchange module). Thereby, a throttling effect is achieved which improves the uniform distribution of the flow and thus promotes effective heat exchange. The hole in the plug for forming the fluid connection, in relation to its diameter, is formed so as to correspond to the desired throttling of the cooling medium.

Furthermore, in one advantageous embodiment of the heat exchange module, a configuration is proposed in which the outer wall of the channel bend is formed by means of a plug.

In this embodiment, a channel bend is formed in the end face at the plug, respectively, in the channel sections of the tortuous working medium channel (eg parallel to each other). According to this embodiment, the plug simultaneously forms an outer wall of the channel bend, ie a wall section arranged on the end face of the heat exchange module. A channel separating web, which fluidically separates two (eg parallel) channel sections from one another, is formed to recede back and away from the plug in the channel direction in the region of the channel bend, so that preferably as little flow as possible For resistance, the narrowest cross-section of the channel bend is formed not smaller than the remaining cross-section of the working medium channel. In one embodiment, fewer plugs are provided than the channel sections occurring at the end face, for example only one plug is provided at one end of the heat exchange module, in which case one plug connects a plurality of channel sections Closed in a flow-tight manner in the direction of the channel. In one embodiment, or at a corresponding position in the working medium channel, the plug is arranged against the channel separating web, in one embodiment between these adjacent channel sections due to part tolerances and/or due to assembly, as play is provided. leaks may be present. In one embodiment, or in a corresponding position in the working medium channel, the plug is significantly spaced from the channel separating web, whereby a channel bend with the smallest possible flow resistance is formed there.

One or more plugs are then formed without holes and configured to deflect the cooling medium from one channel section into an adjacent channel section.

Furthermore, in one advantageous embodiment of the heat exchange module, the plug is provided in the following material bonding method:

- friction stir welding;

- laser welding;

- gas shield welding; and/or

- adhesion

A configuration is proposed that is coupled to the receiving opening in a fluid-tight manner by at least one of.

With friction stir welding, fluid tight welding can be reliably realized by simple means and through a large number of contact surfaces within a very wide range of thermal influence of the friction stir pin. This method is cost-effective and does not require excessive testing costs to check that the contact surface has been successfully sealed in a fluid-tight manner, due to the wide range of thermal influence and the interfaces molten therein.

By using laser welding, precise and relatively energy-saving welding is realized. If the coordinates of the weld seam are followed reliably, the seal achieved is very reliable. At the same time, the heat input and hence the sensitive microstructure of the heat exchange module is limited only very locally, ie only the weld seam itself is damaged.

Gas shield welding is a very low cost method that can be performed either mechanically or manually. Basically, even in this case, the heat-affected range is limited, and the above-described laser welding has advantages and disadvantages. The heat effect range is slightly wider compared to laser welding, and the susceptibility to leakage due to welding error is higher compared to the welding methods described above.

In the welding process, multiple plugs can be joined to the module housing in the same working step and joined in a fluid-tight manner.

Bonding can be carried out in such a way that it has no thermal effect on the material or has a negligible (damaging) thermal effect and has a very reliable fluid-tight condition with simple means under suitable process control. In some cases, durability may be important, for example under vibration loads during mobile use in automobiles and/or in a desired or maximally acceptable temperature range.

Furthermore, in one advantageous embodiment of the heat exchange module, it is proposed that the module housing comprises a receiving chamber for the energy storage module, the receiving chamber adjoining the working medium channel.

In this embodiment, the receiving chamber for the energy storage module is integrated in advance, preferably integrally, into the module housing of the heat exchange module. In this way, very thin wall thicknesses and thus very small thermal conduction resistances can be achieved between the at least one working medium channel and the receiving chamber (or energy storage module). Thereby, again it is possible to request a large power peak from the energy storage module, since the heating caused thereby can be well dissipated and a very finely regulated temperature control is possible. An easily controllable temperature control can reduce operating costs or energy consumption for the cooling circuit.

Furthermore, in one advantageous embodiment of the heat exchange module, the module housing is terminated on the outer side by means of a plug at the same height as the receiving opening of the working medium channel, or within the receiving opening in such a way that the plug is recessed into the channel. Acceptable configurations are proposed.

In this embodiment, a high power density of heat transport can be achieved in a very small mounting space, especially when the plug is terminated flush with the receiving opening of the working medium channel. In one preferred embodiment, the material-bonded plug is formed with a very short installation length (surrounding the sealing surface) compared to a press-fit plug. By means of a suitable bonding method, for example welding, with a (peripheral) sealing face of a very narrow width, sufficient strength and sufficient oil-tight bonding for the working medium pressure in the working medium channel can be produced.

According to another aspect, there is proposed a manufacturing method for a heat exchange module according to an embodiment in the above description, the manufacturing method comprising at least the following steps:

a. providing a module housing and at least one plug;

b. inserting the at least one plug into the corresponding receiving opening; and

c. coupling the plug to the receiving opening in a fluid-tight manner.

Here, a manufacturing method is proposed that allows the heat exchange module of an embodiment according to the above description to be manufactured simply and at low cost. First, in step a, the module housing and at least one plug, preferably at least one plug for each end face of the working medium channel, are provided. The plug is, in step b, inserted into a corresponding receiving opening formed, for example, with a slight relative oversize, and pushed in along the channel direction extension. Finally, the remaining play or the corresponding contact surfaces on both sides are closed in a fluid-tight manner. In this case, at the same time, the plug is mechanically, at the working medium pressure in the working medium channel and under some external loads (eg oscillating loads) occurring, in the receiving opening over the desired life, more precisely in such a way that the plug is fluid-tight. in such a way that it is sufficiently fixed.

In one advantageous embodiment of the manufacturing method, in step d, the fluid connection according to an embodiment in the above description is

- prior to step b, or

- after step c,

A configuration to be formed is proposed.

In one embodiment, the fluid connection is preformed prior to inserting the plug into the receiving opening, ie prior to step b. This allows the plug to be produced (separately) at very low cost prior to the manufacturing method described herein.

In another embodiment, the fluid connection is preferably formed in the plug only after fluid-tight engagement of the plug with the receiving opening. This enables process control in which the shape and type of the fluid connection need not yet be taken into account when forming the oil tight coupling. In a very special case, in friction stir welding, which requires a very wide heat-affecting range, the preformed fluid connection can be affected by deformation of the fluid connection; and/or difficult-to-establish thermal effects of the corresponding (perimeter) contact surface of the oil-tight coupling to be created between the receiving opening and the plug. The fluid connection is produced, for example, by cutting, preferably by boring.

The holes in the plug, in relation to their diameter, can be formed to vary according to the desired throttling of the cooling medium, eg to be individually adjustable for a given flow resistance tolerance.

Furthermore, in one advantageous embodiment of the manufacturing method, in step e before step b, the channel separating web is shortened in the direction of insertion of the corresponding plug on the inside of the channel bend, so that the channel bend in the module housing is prepared. More is suggested.

In this embodiment, preferably used in extruded module housings, where channel bends are to be created, in step e the associated channel separating web is shortened in the channel direction, for example milled. A channel bend is formed (after step b or after step c in a fluid-tight manner) as soon as plugs terminating at least the end sides of the two associated channel sections on both sides of the shortened channel separating web are inserted into the corresponding receiving openings. . That is, the plug forms the outer wall of the channel bend.

Furthermore, in one advantageous embodiment of the manufacturing method, it is proposed that in step f before step b, the receiving opening is adapted to the plug.

The receiving opening in this embodiment is still machined before the plug can be inserted in step b. In one embodiment, said step f is carried out even before step a, for example immediately after separating the associated module housing from an extrusion blank comprising a plurality of module housings in an extrusion length. According to the tolerances of the extrusion profile, the channel inner surface of the working medium channel is machined in the region of the end face of the extrusion profile. Such adjustments may be, for example, changing the surface finish, forming a bevel to facilitate assembly, expanding the receiving opening relative to the flowable section of the working medium channel, a stop for a plug or a Poka-Yoke ) formation of receptacles, surface coating, surface treatment, and/or reduction of relative tolerances. In one embodiment, cleaning is performed prior to bonding of the plugs and/or as a final step in the method, wherein chips, welding residues and/or oil residues and other impurities are removed.

According to another aspect the present invention provides at least one electrically driven machine connected to propulsion wheels in a torque transmission manner; At least one energy storage module in the heat exchange module according to the embodiment in the above description; proposes a vehicle including, the electric drive machine may be supplied with a supply voltage by the energy storage module for propulsion of the vehicle .

Here, a motor vehicle, eg a passenger car, is proposed comprising at least one drive machine, for example an internal combustion engine and/or an electric drive machine, and at least one drive wheel for self-driving. The drive wheel is connected to the at least one drive machine in a torque transmission manner via a transmission and preferably via a differential. The motor vehicle can thereby be driven by the at least one drive machine. The power request of at least one driving machine, and optionally of additional loads in the vehicle, generates heat in the energy storage module, here for example in a so-called traction battery, which heat is effectively converted into very small amounts by means of the heat exchange module. It can be dissipated using the mounting space. In one alternative application, the heat exchange module is used to heat the energy storage module to an optimum temperature (eg in winter), thereby increasing the available power of the energy storage module.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention described above will be described in more detail below on the basis of the related technical background with reference to the associated drawings showing preferred configurations thereof. It should be noted that the present invention is not in any way limited by purely schematic drawings, the drawings are not to scale and are not suitable for defining size ratios.

1 is a front plan view of a heat exchange module;
FIG. 2 is a cross-sectional view along AA of a detail of the heat exchange module according to FIG. 1 ;
Fig. 3 is a view corresponding to section AA of Fig. 1 of a detail of a heat exchange module of an alternative embodiment;
4 is a flowchart of a manufacturing method for a heat exchange module.
5 is a diagram illustrating an automobile having a heat exchange module.

1 shows a heat exchange module 1 in front view, the module housing 3 of which is produced, for example, by extrusion. The module housing 3 comprises a accommodating chamber 11 (here optionally integrally integrated in one piece) configured to receive the energy storage module 2 . Above the receiving chamber 11 in the figure a receiving opening 7 is formed in the channel direction extension of the channel section, here in the form of two elongated holes produced for example by milling (see FIG. 2 ). The two receiving openings 7 are separated by a channel separating web 12 . The channel separating web 12 is here (optionally) formed integrally with the module housing 3 . One plug 8 each having a corresponding shape is inserted into the receiving openings 7 so that the plugs 8 completely fill the predetermined cross-section of the receiving openings 7 . Preferably, the plugs 8 are each received with play in the corresponding receiving openings 7 . Then, in order to join the plug 8 to the receiving opening 7 and to terminate it in a fluid-tight manner, friction stir welding is used as the material bonding method in this embodiment. For this purpose, the friction stir pins 15 are moved, here in the figure from left to right, on the end face (disposed in the plane of the ground) of the heat exchange module 1 in the friction stir direction 16 . Kinetic energy is converted into heat and the material is melted at the interface of the plug 8 (and preferably of the receiving opening 7 ), so that the reliability of the material bonding method between the inserted plug 8 and the receiving opening 7 . A tightly-tight coupling portion is provided. In addition, the plug 8 arranged on the left in the figure comprises a fluid connection 5 (here optionally circular), which is configured for the inlet and/or discharge of the working fluid and is connected to an external line 6 ( 2 and 3). Also indicated therein are cross-sectional planes A-A corresponding to the cross-sectional views of FIGS. 2 and 3 , FIG. 3 showing an alternative embodiment.

FIG. 2 shows a detail of the heat exchange module 1 according to FIG. 1 in a cross-sectional view along A-A. Here, the working medium channel 4 is formed above the left plug 8 of the heat exchange module 1 in the figure, and the working medium channel 4 is formed above the right plug 8 in the figure by the channel bend 10 . It can be clearly seen that the formation of In this embodiment, the working medium channels 4 are formed with (here schematically three) channel sections arranged parallel to each other. Here, the receiving opening 7 is formed in the channel direction extension, ie in the extension of the channel section, here in parallel alignment to the channel separating web 12 . For example, the fluid connection 5 is an inlet and a further fluid connection is formed on the opposite end face (outside the section shown) in the rightmost channel section in the figure (outside the section shown) as an outlet for the working fluid, or vice versa. case is possible. In such an embodiment, the module housing 3 comprises a single working medium channel 4 . Alternatively, a plurality of working medium channels 4 are formed, each with one inlet and one outlet, ie with two fluid connections 5 . In the illustrated embodiment, the leftmost channel section is fluidically separated from one another with the middle channel section by a channel separating web 12 , the middle channel section being separated from the rightmost channel section from the rightmost channel section by a further channel separating web 12 . are fluidically separated from one another (over a predetermined length, ie up to the channel bend 10 ). The channel bend 10 between the middle channel section and the right channel section, shown in the detail above, is, for example, by milling of the right channel separating web 12 , here backward (away from the plug 8 ). formed to recede. The plug 8 on the right according to the drawing at the same time forms the outer wall 9 for the channel bend 10 shown. For example, the cross-section of the receiving opening 7 formed in the channel direction extension is the same as the cross-section of each channel section, and the right plug 8 in the figure is the corresponding channel separating web 12 of the channel bend 10 . ) is overlapped with A step-free transition between the channel section and the receiving opening 7 is advantageous in the case of a module housing 3 produced for example by extrusion, in which rework of the receiving opening 7 is not necessary. Here, the plugs 8 are respectively inserted into the receiving openings 7 of the module housing 3 in the insertion direction 13 (from the bottom to the top according to the figure). The insertion direction 13 is aligned with the channel direction. Thereafter, the plugs 8 are material-bonded fluid-tightly coupled to the module housing 3 by friction stir welding in each receiving opening 7 . Here, the insertion direction 13 (channel direction) is formed here (optionally) in the direction of the channel or at the same level as the end face of the module housing 3 , as an end of the plug 8 for the module housing 3 is formed. With respect to the (predetermined) mounting depth of the furnace plug 8 , the overall mounting length of the heat exchange module 1 is minimal when the working medium channel 4 is long. In this regard, it should be noted that the mounting depth of the plug 8 is much shallower than in a conventional embodiment with a press-fitted connecting piece (eg in the insertion direction 13 ). Also shown here is a fluid connection 5 in the left plug 8 , connected, preferably in a watertight manner, with an external line 6 . The fluid connection 5 is produced, for example, by a subsequent boring process.

FIG. 3 shows a detail of a heat exchange module 1 of an alternative embodiment in section A-A according to FIG. 1 . In the following, the differences shown here are explained and reference is made in particular to the foregoing description in relation to the embodiment according to FIGS. 1 and 2 . In contrast to FIG. 2 , in the illustrated embodiment only one receiving opening 7 is formed in the module housing 3 . A corresponding single plug 8 is accommodated therein. In this embodiment, play is formed between (optionally) the left channel separation web 12 of the drawing and the (single) plug 8, and thus between adjacent channel sections due to component tolerances and/or assembly tolerances. may have a leak. The working medium channel 4 on the right side of the figure is formed as in FIG. 2 , wherein the (single) plug 8 forms the outer wall 9 of the channel bend 10 . Irrespective of the embodiment of the plug 8 , the plug is terminated here (optionally) in material bonding fluid-tight with the receiving opening 7 by means of a laser welded seam 17 .

4 shows a flow diagram of a manufacturing method for a heat exchange module 1 with optional steps d, e and f. For an understanding of the manufacturing method, reference is made to the embodiment according to FIGS. 1 to 3 . In step a, the module housing 3 and at least one plug 8 are provided, and then in step b the plug 8 is inserted into a corresponding receiving opening ( 7) is inserted into Before that, (optionally), in step e, the channel separating web 12 is shortened on the inside of the channel bend 10 in the insertion direction 13 of the corresponding plug 8 , for example by milling. Thus, the channel bending portion 10 in the module housing 3 is prepared. Further, in (optionally) step f, the receiving opening 7 is adapted to the requirements of the plug 8 and/or the bonding method in step c, ie the shape is deformed and/or the surface is machined. In an embodiment in which the receiving opening 7 is reworked according to step f, the receiving opening 7 is reworked preferably simultaneously with the formation of the channel bend 10 in the milling process, [the end having a constant diameter over the depth of indentation] In an end mill] channel sections may expand within the area of the channel bend 10 . Step c comprises fluid-tight coupling of the plug 8 to the receiving opening 7 , for example by laser welding or friction stir welding. In (optionally finally), (optionally) step d, the fluid connection 5 is formed in the plug 8 , for example by boring.

5 is a schematic plan view of a motor vehicle 14 . (optionally) connected to the rear left drive wheel 20 and the rear right drive wheel 21 via a transmission 24 and a differential 25 for driving the vehicle 14 (optionally electrically ) a driving machine 18 is arranged. In the front region of the motor vehicle 14, a front left drive wheel 22 (optionally additionally or alternatively) also connected in torque transmission manner with a second (optionally electrical) drive machine 19 for driving ) and the front right drive wheel 23 are preferably arranged steerably. Here, a heat exchange module 1 is now provided (optionally between the rear drive wheels 20 , 21 and the front drive wheels 22 , 23 ), for example according to the embodiment of FIGS. 1 to 3 , which The heat exchange module comprises an energy storage module 2 , preferably in the form of a traction battery, for powering at least one of the drive machines 18 , 19 .

By using the heat exchange module proposed herein, the mounting space is efficiently used, and the heat exchange module can be simultaneously manufactured at low cost.

Claims (10)

A heat exchange module (1) for an energy storage module (2), comprising at least
- a module housing (3) for heat transfer contact with the energy storage module (2);
- at least one working medium channel 4 for a working fluid for heat transport; and
- at least one fluid connection (5) for at least one external line (6) for the working fluid of the working medium channel (4),
The at least one working medium channel (4) defines at least one receiving opening (7) having a predetermined cross-section in the channel direction extension of the working medium channel (4), in which the receiving opening ( A heat exchange module (1), characterized in that a plug (8) having a shape filling the predetermined cross-section of 7) is received for fluid-tight engagement in the receiving opening (7). According to claim 1,
A heat exchange module (1), wherein the plug (8) comprises a fluid connection (5). 3. The method of claim 1 or 2,
A heat exchange module (1), in which the outer wall (9) of the channel bend (10) is formed by the plug (8). 4. The method according to any one of claims 1 to 3,
The plug 8 is formed by the following material bonding method:
- friction stir welding;
- laser welding;
- gas shield welding; and/or
- adhesion
a heat exchange module (1) coupled in a fluid-tight manner to the receiving opening (7) by at least one of: 5. The method according to any one of claims 1 to 4,
The module housing (3) comprises a receiving chamber (11) for an energy storage module (2), the receiving chamber adjoining the working medium channel (4). 6. The method according to any one of claims 1 to 5,
The module housing 3 is accommodated in such a way that it is either terminated on the outside by a plug 8 at the same height as the receiving opening 7 of the working medium channel 4 or that the plug 8 is recessed into the channel. A heat exchange module (1) received in an opening (7). 7. A method for manufacturing a heat exchange module (1) according to any one of claims 1 to 6, comprising at least
a. providing said module housing (3) and at least one plug (8);
b. inserting at least one plug (8) into a corresponding receiving opening (7); and
c. coupling the plug (8) to the receiving opening (7) in a fluid-tight manner. 8. The method of claim 7,
In step d, the fluid connection (5) mentioned in claim 2 comprises:
- prior to step b, or
- after step c,
Formed, a method of manufacturing a heat exchange module. 9. The method according to claim 7 or 8,
In step e before step b, the channel separating web 12 is shortened in the insertion direction 13 of the corresponding plug 8 on the inside of the channel bend 10, so that in the module housing 3 the channel bend ( 10) is prepared, the heat exchange module manufacturing method. 10. The method according to any one of claims 7 to 9,
In step f before step b, the receiving opening (7) is adapted to fit the plug (8).

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